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在ANSI C标准中,C语言共有32个关键字,包含9种控制语句,区分大小写;C99在其基础上,新增5个关键字;C11又新增7个关键字,总共44个。
32
数值类型7short, int, long,
double, float,
unsigned, signed,
其他类型1char
类型判定2typedef, sizeof
声明结构3struct, enum, union,
特征修饰2const, volatile
存储器指定4auto, register, static, extern
条件语句5if, else, switch, case, default
循环语句5for, do, while, continue, break
函数相关2void,return
无条件跳转1goto
部分说明:
* volatile:用于防止编译器优化
C99新增5个
inline用于指定内联函数,可取代宏
restrict用于保护被指针引用的对象
-Bool布尔数据类型
_Complex复数数据类型,用I表示虚数
_Imaginary虚数类型
C11新增7个
_Alignas按照指定数据类型对齐
_Alignof返回数据类型内存对齐的字节数
_Atomic被修饰变量工作时,禁止其他线程调用
_Static_assert静态断言
_Noreturn调用完成后,不反悔到主调函数
_Thread_local声明线程存储器
_Generic